2026 ICD-10-CM Diagnosis Code H55Nystagmus and other irregular eye movements

ICD-10-CM Codes›H00–H59›H55-H57›H55

ICD-10-CM H55
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H55 is a non-billable ICD-10-CM category code for nystagmus and other irregular eye movements, so it cannot be submitted on claims. Use a more specific code from this category instead, such as H55.00, H55.01, H55.02, and H55.03.

Code Identity

ICD-10-CM Code
H55
Billable Status
No — Non-Billable Category
Code Describes
Nystagmus and other irregular eye movements
Chapter
H55-H57
Other disorders of eye and adnexa

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH55-H57Other disorders of eye and adnexa
CategoryH55Nystagmus and other irregular eye movements
This CodeH55Nystagmus and other irregular eye movements

Specific Coding for Nystagmus and other irregular eye movementsOverview

Non-specific codes like H55 require more characters. Use one of these billable codes instead:

  • H55.0 for Nystagmus

  • Use H55.00 for Unspecified nystagmus

  • Use H55.01 for Congenital nystagmus

  • Use H55.02 for Latent nystagmus

  • Use H55.03 for Visual deprivation nystagmus

  • Use H55.04 for Dissociated nystagmus

  • Use H55.09 for Other forms of nystagmus

  • H55.8 for Other irregular eye movements

  • Use H55.81 for Deficient saccadic eye movements

  • Use H55.82 for Deficient smooth pursuit eye movements

  • Use H55.89 for Other irregular eye movements

Patient EducationClinical

Eye Movement Disorders

When you look at an object, you're using several muscles to move both eyes to focus on it. If you have a problem with the muscles, the eyes don't work properly.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H55Overview

Is H55 (Nystagmus and other irregular eye movements) a billable code?

No. This is a category header that groups the codes for nystagmus and other irregular eye movements, and headers cannot be submitted on claims. Claims for nystagmus and other irregular eye movements need a more specific code from this category, such as H55.00, H55.01, and H55.02.